tscherning



Aug. 17 1926.

Filed Nov 14, 1925 1,596,637 H. TSCHERNING I MOLDING MACHINE 4 Shaina-Sheet 1 Aug. 17 1926. 1,596,631 7 H. TSCHERNING MOLDING MACHINE filed Nov. 14, 1925 4 Sheets-Sht 2 v TSCHERNING MOLDING MACHINE Filed Nov. 14, 1925 4 Sheets-Sheet 5 Aug. 17 1926.

H. TSCHERNING MOLDING MACHINE Filed Nov. 14, 1925 4 sheets-sheet i Patented Aug. 17, 1926.

nnnnrrsensnnmo, or FREEPQRT, it mois, Assienon to anoetnnanomomnarite do, or rnnnronr, ILLINOIS, A CORPORATION GF'iLLINOIS.

monomer machine.

1 application into November invention relates to molding machines of the type comprising an invertible table for the flask, and l'ochingmeans for bold the table in different positions to which it is rotated about its axis; and more par- 7 tioolariy to machines comprising means o crate to squeeze the sand in the flask an means whereby the pattern and flashniay be esptitted. primary object is to provide loo-hing means ion-the table of such a construction, eonetrteted that regardless of looseness 1n the pivotal support. for the table, the table Wilt held against roeking on: its support during the operation, or operations, of the machine in which it should be so held to avoid the piodaeing of imperfect molds, as iorenarnp le in the squeezing and drawing operations; In the sqtee zing operation 1t isdesii-ed that the tablets looked against because if'it doe roe-k in such operation the sand will become non-uniforml paokeain the flask thus producing a tendeney 'to'the tearing tithe mold when the pattern is drawn, and in the drawing operation such locking is desired to prevent the ittttiinfroth tilting with the table relative o the mold "and whieh would tear the mold or produce distortion thereot a a 1 inasmuch as I have devised my invention use inore partitnlarly in a machine pro vtaing ror the sqneesing' of V the mold and the erasing-or the patternfl have chosen to illustrate it in such "a maohina my improveinsnceheing shown as incotporatedin a maehine or the generar tonstruetion shown and assented in myth S, Letters'Pa-tent No; 1 21,339 granted Aflgust; 29 1922,

Referring to the a'eeompanying drawigure 1 is a'view in side elevation of the machine-disclosed in said patent showing my present im rovements incorporated t11eroin= Figurenis'an enlarged view in side elevation of a portion ofthe mechanism shown --inFig-. lane with which my improvements h'ifii diibtly 66- operate. a Figure 3 its broken seetion teke ttthe lines Fig. 2 and viewed in the direetitn of the arrow. Figure 4 teen end view of the invertible patternand-fla'sk-cah rying table forming, a part of the machine illustrated; and lgilf 5', a view in front elevation of the machine.

The machine shown comprises a base 5 14, 1925. serial No. 69,041.

inoimtedon wheels 6 and from which rise Upright guide rods 7 at 'each end, with slides 8 moving on each end pair of rods, respectively. A pattern table '9 to which the pattern would be attached at the portion 10 thereof,.-ismounted in the slides 8 to rotate about its longitudinal axis to permit this table to be inverted fromthc position shown in the drawings throughout 180 and back to the position shown, as desired, the'tabl'e being equipped with jarring mechanism as described in said patent, the jarring cylinder of which is represented at 11, thetable 9 in the jarring operation being inverted from the position shown in the drawings and bearing at'its cylinder 11 upon an anvil 12 supported on an upright 13 carried by the base 5 and adapted to beswiing later ally into and out of the position shown in Fig. l. 1

The slides 8, together with the-table 9, are adapted to be raised and lowered on the rods 7, by means of links 14: pivotally connected at their upper ends with the slides 8-, as indicated at '14, and at their lower ends, as represented at 15, to the lower ends of crank arms 16 fixed 'on the ends of shaft 17 journaled on the base Sand adapted to be oscillated, in any suitable rnann'er, as for example by power mechanism (not shown),

In the operation of the machine shown which, except as regards the locking feature hereinafter referred to, is the same as that shown in my patent above referred to, the cope, or drag, as the case may be where only one part of the flask is to be produced by the operation of the machine, or both the cope and the drag where both are to be pro duc'cd by one operation, in which latter case the cope and drag would extend side by side, are applied to the pattern-carrying portion 10 of the table 9, the table, in this operation being inverted frointhe position shown in the drawings, the sand for forming the mold 100 is then applied to position, the jarring mechanism set into operation to jar the same, and a board, or boards, as the case Maybe, then applied to the flask section, or sections, these boards hem of a size to ex- 105 tend. within the confines o thesides of the flask sections, and with these boards held against displaeement, by the clam in devices 20 and 21, the table 9 is rotated on its trunnions, represented at 18, to the position shown in the drawings, the slides 8, to-

rods to cause the boards referred to to bear against the central portion 19 of the member 12 which operates to squeeze the sand into firmly compacted condition in the flask and about the pattern. The operator then re leases the lamps 20 and 2-1, and raises the slides 8 and the table 9 on the guide rods 7 thereby upwardly drawing the pattern out of the mold which remains deposited on the member 12, following which operation the latter is swung laterally on the member 13 to render the mold freely accessible to the operator for removing it from the machine.

It is necessary that means be provided for locking the table 9 inits various positions of adjustment about the axis of the trunnions 18 above referred to, and it is also desirable, and necessary for the production of perfect molds, that the table 9 be held against tilting during the squeezing and drawing operations referred to and this I accomplish by my improved locking means of whichthe following is a description:

Slidably mounted in one of the slides 8, to be movable toward and away from the adjacent end of the table 9, is a locking bolt 22 which is positioned in direct vertical alignment with the axis of the trunnion 18, this bolt being normally spring-pressed toward the table 9 by a coil spring 23 carried by the slide 8 referred to. The endof the table 9 adjacent this locking bolt contains diametrically-opposed, radially-elongated, openings 24.- which are aligned in a plane at a right angle to the face portion 10 of. the table, these openings being so disposed that one of them receives the outer tapered end portion 25 of the bolt 22 when the table is in one position about its axis and the other thereof receives this bolt when the table is rotated through 180, the bolt being withdrawable, against the" tension of the spring 23, from the one of the openings 24 which it happens to extend into, for permitting of the rotation of the table 9, by means of alever 26 fulcrumed at 27 on a stud 28 supported on the one of the slides 8 which car-- ries the locking bolt 22, the lever 26 being pivotally connected between its ends, as rep resented at 29, to the outer end of the look ing bolt.

It will thus be understood from the foregoing description that by providing the radially-elongated openings 24 arranged as stated and positioning the locking bolt 22 in vertical alignment with the axis of the trunnions 18, such looseness as may occur between the trunnions 18 and their bearings will be taken up vertically, without producing tilting of the table 9, inboth the squeezing' and pattern-drawing? operations. Therefore the sand will be uniformly squeezed in the mold and the pattern will. be drawn accurately from thejniold. i

While I have illustrated and described a particular embodiment of my invention I do not wish to be understood as intending to limit it thereto as the same may be variously modified and altered without departing from the spirit of my invention.

What I claim as new, and desire to secure by Letters Patent, is:

1. .In a molding machine, the combination of a support, a pattern-carrier pivotedon said support, and locking means for said carrier extending in vertical alignment" with the axis of said pivot.

2. In a molding machine, the combination of a support, a pattern-carrier pivoted on said support, and locking means for said carrier extending in vertical alignment with the axis of said pivot, said-support and carrier being relatively movable in vertical plane in the operative ing means. y I

3. Ina molding machi' e, the combination of-a support, a pattern carrier pivoted on said support, and locking means for said position of said lock- .1.

carrier comprising interlocking portions oneof which is on said carrier, said inter locking portions when in interlocked position extending in vertical alignment with the axis of said pivot and being constructed and arranged to permit relative movement of said portions in a vertical plane.

4. In a molding machine, the combination of a support, a pattern-carrier pivoted on said support, and locking means for said carrier comprising a on said support in vertical alignment with said pivot and'adapted to extend into inradially-elongated opening in saidcarrier and a locking pin terlocking engagement with said opening.

5. In a molding machine, the combination of a support, a pattern-carrier pivoted on said support, and locking means for said carrier comprising diametrically-opposed radially-elongated openings in said carrier and a locking pin on said support in vertiq cal alignment with said pivot and adapted to extend into interlocking engagement with either of said openings. I

6. In a molding machine, the combination of a support, slide means movable up and down on said support, a pattern-carrier pivoted on said, slide means and locking means for said carrier comprising portions on said. slide means and said carrier in vertical alignment with said position.

HENRY 'rsonnnnnvo. I

pivot in the locking 

